KVM: PPC: booke: Added DECAR support
Added the decrementer auto-reload support. DECAR is readable
on e500v2/e500mc and later cpus.
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index dd783be..50ea12f 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -418,7 +418,9 @@
ulong mcsrr1;
ulong mcsr;
u32 dec;
+#ifdef CONFIG_BOOKE
u32 decar;
+#endif
u32 tbl;
u32 tbu;
u32 tcr;
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 72f13f4..86681ee 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -1267,6 +1267,11 @@
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
+ if (vcpu->arch.tcr & TCR_ARE) {
+ vcpu->arch.dec = vcpu->arch.decar;
+ kvmppc_emulate_dec(vcpu);
+ }
+
kvmppc_set_tsr_bits(vcpu, TSR_DIS);
}
diff --git a/arch/powerpc/kvm/booke_emulate.c b/arch/powerpc/kvm/booke_emulate.c
index 6c76397..9eb9809 100644
--- a/arch/powerpc/kvm/booke_emulate.c
+++ b/arch/powerpc/kvm/booke_emulate.c
@@ -129,6 +129,9 @@
kvmppc_set_tcr(vcpu, spr_val);
break;
+ case SPRN_DECAR:
+ vcpu->arch.decar = spr_val;
+ break;
/*
* Note: SPRG4-7 are user-readable.
* These values are loaded into the real SPRGs when resuming the
diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c
index 8b99e07..e04b0ef 100644
--- a/arch/powerpc/kvm/e500_emulate.c
+++ b/arch/powerpc/kvm/e500_emulate.c
@@ -269,6 +269,9 @@
*spr_val = vcpu->arch.shared->mas7_3 >> 32;
break;
#endif
+ case SPRN_DECAR:
+ *spr_val = vcpu->arch.decar;
+ break;
case SPRN_TLB0CFG:
*spr_val = vcpu->arch.tlbcfg[0];
break;